Made during the second world war or in the years just after, a Heinke '6 bolt helmet. Until then Siebe Gorman was sole supplier to the Admiralty but when their factory was bombed out by the Luftwaffe they could no longer supply the military and also Heinke was allowed to supply 6 bolt helmets. Siebe Gorman helmets have a breastplate made of copper sheath and brass fittings, Heinke manufactured their 6 bolt helmet with a heavy cast gun metal breastplate. These helmets have been manufactured in very small numbers only. Condition: see photo's. Price on request